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US 4,072,441 AGranted
Hole saw
AssigneeParker Manufacturing Company
InventorGabriel M. LaPointe
Life of this patent
Estimating the term…
Abstract
Hole saw consisting of a hardened metal tube with ground teeth at one end and a plastic cap at the other end.
Claims4
Hole saw, comprising:
- a. a hardened metal tube having teeth formed at one end edge,
- b. a cap formed of a tough polymer fitted to the other end of the tube, and
- c. means locking the cap and the tube together in driving relationship, the means consisting of axially-extending notches formed on the said other end of the tube and torque lugs laterally formed on the cap to fit snugly in the notches, apertures being formed on the tube adjacent the said other end and resilient detent fingers being formed on the cap to snap into the apertures to prevent relative axial movement between the tube and cap.
Dependencies are inferred from the claim text.